On truck in my sig, I've been running this setup fro almost 90k miles. No problems and no rubbing. Had the H2's, 285 BFG's, and Daystar spacers on all since 8k. If I did see any change in mileage, it was negligible. I will say be ready to replace control arms/ball joints (all one assembly) due to the spacers. Not sure why they don't play well together, but I'm on my second set now and will run these until they get so bad I have to do them again.